Physiological traits of the symbiotic bacterium Teredinibacter turnerae isolated from the mangrove shipworm Neoteredo reynei

Genetics and Molecular Biology

Amaro E. Trindade-silva¹  Erik Machado-ferreira¹  Marcus V.x. Senra¹  Vinicius F. Vizzoni¹  Luciana A. Yparraguirre¹  Orilio Leoncini¹  Carlos A.g. Soares¹ 

[1] ,Universidade Federal do Rio de Janeiro Instituto de Biologia Departamento de Genética

关键词: Teredinibacter turnerae;    cellulolytic and nitrogen fixing bacteria;    antibiotic activity;    mangrove shipworm symbiont;    Neoteredo reynei;   

DOI  :  10.1590/S1415-47572009005000061

来源: SciELO

【 摘 要 】

Nutrition in the Teredinidae family of wood-boring mollusks is sustained by cellulolytic/nitrogen fixing symbiotic bacteria of the Teredinibacter clade. The mangrove Teredinidae Neoteredo reynei is popularly used in the treatment of infectious diseases in the north of Brazil. In the present work, the symbionts of N. reynei, which are strictly confined to the host's gills, were conclusively identified as Teredinibacter turnerae. Symbiont variants obtained in vitro were able to grow using casein as the sole carbon/nitrogen source and under reduced concentrations of NaCl. Furthermore, cellulose consumption in T. turnerae was clearly reduced under low salt concentrations. As a point of interest, we hereby report first hand that T. turnerae in fact exerts antibiotic activity. Furthermore, this activity was also affected by NaCl concentration. Finally, T. turnerae was able to inhibit the growth of Gram-negative and Gram-positive bacteria, this including strains of Sphingomonas sp., Stenotrophomonas maltophilia, Bacillus cereus and Staphylococcus sciuri. Our findings introduce new points of view on the ecology of T. turnerae, and suggest new biotechnological applications for this marine bacterium.

【 授权许可】

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